Marauder vs Shadow EK builds (w/ comparison)

I have been comparing Etup's Marauder EK to Invalesco's Shadow EK. I am trying to choose between them as a base. A big question is how big of a deal it is not to get crit?

Here are the major differences between the two.

Marauder:

Spoiler

100% more Increased Armor
110% more Increased Life
4.4% more Life Regenerated per Second
10% reduced mana reserver
2 maximum endurance charger
10 Dex more
190 Strength more
10 more Maximum Life
30% more All Elemental Resists
5% more maximum elemental resists
Converts all Evasion Rating to Armor
Take 30% reduced Extra Damage from Crits

As you can see the Marauder build is a a moderate amount tankier, the big numbers being 110% more Increased Life, 4.4% more Life Regenerated per Second, 30% more Elemental Resists, 5% Maximum Elemental Resists, 100% more Armor, Iron Reflexes.

Update: Auras and BM
Another big difference between the two builds, the Marauder build uses the Blood Magic keystone, or in end-game the Blood Magic gem. This allows the Marauder to run more auras such as Vitality/Determination/Hatred/Haste/Grace/Purity

The Shadow build does not use BM gem and typically runs along the lines of Vitality/Determination/Hatred/Discipline. Shadow also has to worry about using mana leech (although with good regen/EB your pool might be big enough to not need a Mana leech gem.)

I will be creating my own build but need to decide which class to start as. I have read that critical strike is bad because of reflect, but lots of people seem to have success with the Shadow build. If it is manageable the extra damage offered by going Shadow is insane compared to the moderate amount of extra tankiness from the Marauder one.

I think its important to mention that if you stack more %hp at mara EK you open the option to run three 40% auras on your mana pool and BM your EK. Granted its one less gem slot i would gladly trade the benefit of vitality, determination purity for it.

This is ofc assuming you build on the premise that you do not have people to run with that carry those auras ((such as myself))